Japslap 

1.(v.) To strike or slap a person across the face in a powerful and painful manner.
2. (noun)A painful slap across one's face.

That dude was talking trash so I japslapped him in da face!

Don't make me japslap you!

Did you see how hard that dude japslapped him?

I'm about to japslap that bitch!

Japslap by kirkus maximus February 4, 2010

Japslap 

To slap a man in the testicles, crippling them for hours.

Fraser : Why did you japslap me
Lidia : You annoyed me

Japslap by SirReem February 21, 2012

Superman Jap Slap 

Superman Jap Slap is when you perform the martial arts move of the “Superman Punch” but instead of punching, you slap your opponent with an open palm moving in a downward diagonal motion right-to-left (for right handers).

Dude, that student just got Superman Jap Slapped by his teacher!

Superman Jap Slap by Mr. Beef Wellington January 24, 2019

Jap Slap 

To Jap Slap someone, is to slap them when they are not aware of the incomming slap. (I.E Sneak attack)

Comes from when the Japanese bombed Pearl Habor in sneak attack fashion.

"When Alex wasnt looking I Jap slapped him right in the back of the head"

Jap Slap by Gary B January 12, 2005

jamslap 

to pin someone against the wall by the throat, then slap them across the face.

That girl just jamslapped the hell out of that byotch.

or

That bbq was so damn good, it makes you wanna jamslap a muthafucka.

jamslap by t-montey December 23, 2008

jap-slap 

An open handed slap to the face. Reasons: stupidity, retribution or to rebuke a whiner. A callous and contemptous blow in order to restore sanity in their own little world.

I jap-slapped Ted for complaining about sprinkles on his donuts. Then I jap-slapped Jessica for being so stupid as to agree with Ted.

jap-slap by Bodean March 16, 2004

Jap Slap 

A highly technical, extremely dangerous martial arts move in which the individual performing the act strikes their victim with one side of their open hand, then immediately reverses the course and brings the other side of their hand accross the victims face.

My wife wouldn't stop sobbing after her cat died, so I jap slapped her and put her to work on the dishes. Sometimes you have to go that extra mile to help with the healing process.

Jap Slap by Stabsunteroffizier Wunderbar February 28, 2008